Replying to Buying dslr in time square New York

So I'm in newyork for the weekend and I see hundreds of these sketchy shops that sell a shit ton of electronics including really cheap dslrs. I'm pretty sketched out to buy one from them so I'm asking u guys if u guys know or think they are legit cause there really cheap and look brand new and I'm pretty sure they come new in the box all wrapped and stuff.
So my questions
R they legit?
R they safe to buy?
Why are they so cheap?
How cheap can negotiate it for?
Any help would be great I just don't want to spend the money and have it break